#include <stdio.h>
#include <stdlib.h>

// Function prototypes
static void foo(int n);
static void bar(int n);
static void baz(int n);

/**
 * Main function
 * Entry point of the program.
 */
int main(int argc, char *argv[]) {
    if (argc != 2) {
        fprintf(stderr, "Usage: %s <integer>\n", argv[0]);
        return EXIT_FAILURE;
    }

    char *endptr;
    long input = strtol(argv[1], &endptr, 10);

    if (*endptr != '\0' || input <= 0 || input > INT_MAX) {
        fprintf(stderr, "Invalid input. Please provide a positive integer.\n");
        return EXIT_FAILURE;
    }

    foo((int)input);

    return EXIT_SUCCESS;
}

/**
 * Function: foo
 * Description: Calls the `bar` function.
 */
void foo(int n) {
    printf("In foo with n = %d\n", n);
    bar(n);
}

/**
 * Function: bar
 * Description: Calls the `baz` function.
 */
void bar(int n) {
    printf("In bar with n = %d\n", n);
    baz(n);
}

/**
 * Function: baz
 * Description: Final function in the call chain.
 */
void baz(int n) {
    printf("In baz with n = %d\n", n);
    // Placeholder for actual logic
}